2. Supposing you want to call your girlfriend at 0200, you can turn
on phone and talk. Let’s say you hangup at 0220. Then, the phone will
shutdown at [0220 + 30] = 0250. In short, whenever you turn on and use
your phone between [Begin time] and [End time], the phone will wait for
[inactivity time] and auto shutdown.

1. If you talk more than the [inactivity time], the phone will auto
shut down in the middle of the conversation because the last key press
was the time the call was made. You don’t press any key while talking,
do you? Hope next version will clear this bug. Anyway, my girlfriend
don’t talk to me for more than 5 mins.